I'm asking the technician listserve as I think that may be the year when compatability issues started.... If I remember, it is due to the headrests being permanently afixed (adjustable, but not removable) -- which tend to push tall carseats too far foward.
The good news is that your kiddos can & should both still be
RF (
rear facing)

Please visit my website for details as to why this is so important + to see 5 year olds comfortably
RF
The only high weight (
FF) harness seat that I think may work is the
Safeguard Go

I'm not sure if you'll be able to squeeze an
infant seat in with 2 of these, though

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 | SafeGuard - Click for more info |  | Indiana Mills and Manufacturing (IMMI) is SafeGuard’s parent company, and has been in the business of developing and manufacturing quality safety systems for every facet of the transportation industry for over 40 years, covering everything from the heavy truck and agricultural industries to child seating.
IMMI has a world-renowned reputation for creating and promoting the highest rated safety harnesses and restraint systems available today, from integrated child seats in production vehicles to campaigning for increased use of safety harnesses on public transportation systems. Based in Westfield, Indiana, SafeGuard has been creating and testing essential components used across the child safety seat industry through their state of the art crash testing facilities since 1961. The SafeGuard and SafeGuard Go are IMMI’s first direct foray into the child safety seat market, and the results are simply outstanding. No other car seats or boosters are designed with as much attention to structural integrity, ease of installation, and total child safety. This seat has been subjected to the most thorough and extensive testing “ever conducted in the industry”: virtual prototyping with computer models; rigorous front, side, and rear impact crash testing; and environmental testing in a range of climates and road types. | |  |
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